Before "Someone Great" was one of 2007's best songs, it was an instrumental section to LCD Soundsystem's 2006 iTunes-only workout disco symphony, 45:33. Now issued on CD with a trio of bonus tracks, we get a chance to hear the creative process in reverse. A piece of music commissioned by Nike, 45:33 was designed to accompany a 45-minute cardio workout, complete with warm-up and cool-down sections. Despite the commercial nature of it, this project is an interesting creative concept and one for which James Murphy was ideally suited. Irreverent, full of hidden subtleties, and just as fun off the treadmill.